Accession Number : AD0659150

Title :   THE LIFETIME OF H ALPHA-STRUCTURES IN ACTIVE REGIONS ON THE SUN,

Corporate Author : OSLO UNIV (NORWAY) INST OF THEORETICAL ASTROPHYSICS

Personal Author(s) : Gimse,Odd

Report Date : 1967

Pagination or Media Count : 19

Abstract : During the last two quarters of 1966 time series of exposures of active regions on the sun were obtained at the Solar Observatory at Harestua using the Zeiss Coude refractor and a Lyot monochromator. By a graphic method the mean lifetime of 574 fibrills taken from 81 selected areas is found to be 4 hours. (Author)

Descriptors :   (*ASTROPHYSICS, *SUN), (*HYDROGEN, SUN), ASTRONOMICAL CAMERAS, PHOTOGRAPHS, EXPOSURE METERS, ASTRONOMICAL OBSERVATORIES, TABLES(DATA), PHOTOGRAPHIC FILM, TIME, MONOCHROMATORS

Subject Categories : Astrophysics

Distribution Statement : APPROVED FOR PUBLIC RELEASE